But it don't fecin fit

My bad ...............Seems I can work to the thou but 1/2" ? ney
Anyway it's for the Rude-bwoy racer so it will be made to fit
4 core and 9 row more so should double the efficiency at least I hope

[Alpineandy]

As you've had it made up why didn't you put the inlet & outlet at the corners?

Stress on the std pipework I don't think it matters that much where the in and outs are ...................It all flows from one end tank to another through 30 something channels ,under pressure , there's no 'path' as such .